Self-locking flow regulating needle valve

Abstract

The invention discloses a self-locking flow regulating needle valve. The self-locking flow regulating needle valve comprises a valve seat, a guide base, a valve rod base and an upper cover, wherein achoke plug is fixedly connected in the upper cover; the upper cover is fixedly connected in the valve rod base; the valve rod base is fixedly connected in the guide base; the guide base is fixedly connected in the valve seat; the lower end of the valve seat is provided with an inlet; the inlet communicates with a fluid inlet; a fluid outlet is transversely formed in the side surface of the valve seat; the upper end of the valve rod is movably blocked in the upper cover and the valve rod base; the valve element is in threaded connection to the lower end of the valve rod; the outer edge of the valve element is blocked to the lower end of the guide base; the lower end of the valve element is equipped with the needle valve; and the needle valve is movably blocked to the lower-end inlet of thevalve seat. The self-locking flow regulating needle valve has the advantages of being micro in regulation, good in sealing effect, capable of being self-locked and the like.

Description

technical field [0001] The invention relates to a flow regulating needle valve, more specifically to a self-locking flow regulating needle valve. Background technique [0002] Flow adjustment is required in industrial pipelines. The manual flow control valve currently used basically uses the rotating handwheel to make the valve stem and valve core rotate together, and adjust the gap between the valve core and valve seat to achieve the purpose of flow adjustment. . Such a structure will cause many problems in actual use, such as rotating the handwheel, which is more convenient for adjustment, but in actual use, human misoperation often occurs, or the on-site personnel accidentally touch the handwheel, which will cause poor adjustment. Unexpected changes in the flow rate will affect the stable operation of the pipeline system; secondly, the valve stem and the valve core rotate together, the accuracy of the thread is affected by the structure, the positioning stability is not ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the flow regulating needle valve in the prior art uses a rotating handwheel, which is likely to cause misoperation and cause unexpected flow adjustment Changes, the valve core and the valve stem rotate together, it is impossible to achieve micro-adjustment, the seal of the valve stem is easily damaged, and the valve stem cannot be self-locked, etc.

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